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Scientific American, Vol. 59, No. 19 (1888) (1888)
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tes used the exposure required was a little less than half a second. Observations were made with ner ellipse, while a star almost as bright as the onein ELECTRIC CONTROL OF THE GREAT TELESCOPE. the center is seen exactly at the preceding extremity of the various instruments during the total lunar… … during favorable opposi- ed if fractions of seconds are to be taken into ac- tions, and determine the © 1888 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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